Blank String Default Value in Entity Framework Designer

Question

Is it possible to assign a blank string (i.e. "") as a Default Value in the Entity Framework's EDMX designer? The only technique I've found is to edit the edmx file manually using a text editor

Answer 1

I realize that this is an extremely old question, but for posterity's sake, in the EF4 designer you can type a space in the properties window field, then hit backspace, leaving the field empty instead of the default value of (None). For strings, this seems to default to String.Empty.